Thilo Fromm announced a new RestMS project based on Python and Django, on 10 April 2009:

The Python/Django RestMS server implementation I'm planning to work on just went to github. It isn't much more yet than some readme files and basic project infrastructure code. Thanks to django's rapid prototyping features, however, one can start to implement the business logic foundation, as there is almost no boiler plating. If you're interested, you're best off starting at the project homepage http://t-lo.github.com/ahkera/. Everything else is linked there. Don't be afraid if you're new to python and/or django, as the documentation of both is excellent, and they're easy to learn and fun to use.